Manual merge from mysql-trunk.

Conflicts:
  - mysql-test/r/partition.result
  - mysql-test/r/variables_debug.result
  - mysql-test/t/partition.test
  - mysql-test/t/variables_debug.test

mysql-test/t/mysql_client_test.test

@@ -16,4 +16,11 @@ SET @old_general_log= @@global.general_log;
 # End of 4.1 tests
 echo ok;
 
+--echo
+--echo # cat MYSQL_TMP_DIR/test_wl4435.out.log
+--echo # ------------------------------------
+--cat_file $MYSQL_TMP_DIR/test_wl4435.out.log
+--echo # ------------------------------------
+--echo
+
 SET @@global.general_log= @old_general_log;

mysql-test/t/parser_stack.test

@@ -399,4 +399,12 @@ delimiter ;$$
 
 drop procedure p_37228;
 
+#
+# Bug#27863 (excessive memory usage for many small queries in a multiquery
+# packet).
+#
 
+let $i=`select repeat("set @a=1;", 65535)`;
+--disable_query_log
+eval $i;
+--enable_query_log

mysql-test/t/partition.test

@@ -2119,6 +2119,50 @@ SET SESSION SQL_MODE=DEFAULT;
 #
 #DROP TABLE t1;
 
+--echo #
+--echo # Bug#46198: Hang after failed ALTER TABLE on partitioned table.
+--echo #
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+#
+# Case 1.
+#
+
+CREATE TABLE t1 (s1 INT PRIMARY KEY) PARTITION BY HASH(s1);
+
+LOCK TABLES t1 WRITE, t1 b READ;
+
+UNLOCK TABLES;
+
+--error ER_ONLY_ON_RANGE_LIST_PARTITION
+ALTER TABLE t1 DROP PARTITION p1;
+
+# The SELECT below used to hang in tdc_wait_for_old_versions().
+SELECT * FROM t1;
+
+DROP TABLE t1;
+
+#
+# Case 2.
+#
+
+CREATE TABLE t1 (s1 VARCHAR(5) PRIMARY KEY) PARTITION BY KEY(s1);
+
+LOCK TABLES t1 WRITE, t1 b READ;
+
+UNLOCK TABLES;
+
+--error ER_UNIQUE_KEY_NEED_ALL_FIELDS_IN_PF
+ALTER TABLE t1 ADD COLUMN (s3 VARCHAR(5) UNIQUE);
+
+# The SELECT below used to hang in tdc_wait_for_old_versions().
+SELECT * FROM t1;
+
+DROP TABLE t1;
+
 --echo #
 --echo # BUG#51868 - crash with myisam_use_mmap and partitioned myisam tables
 --echo #

mysql-test/t/variables_debug.test

@@ -11,6 +11,16 @@ select @@debug;
 set debug= '-P';
 select @@debug;
 
+#
+# Bug#38054: "SET SESSION debug" modifies @@global.debug variable
+#
+
+SELECT @@session.debug, @@global.debug;
+
+SET SESSION debug = '';
+
+SELECT @@session.debug, @@global.debug;
+
 --echo #
 --echo # Bug #52629: memory leak from sys_var_thd_dbug in 
 --echo #  binlog.binlog_write_error